Determination system, vehicle, and determination method

Abstract

A battery ECU is a system that determines a battery assembly that stores power used for running a vehicle and that is mounted on the vehicle in a replaceable state, the system comprising: a processor; a memory that stores a genuine product characteristic that is a temperature change characteristic of a genuine product, the temperature change characteristic being a characteristic of an index which changes with temperature of the battery assembly and when not being charged or discharged; and a sensor that acquires a determination target characteristic that is a temperature change characteristic of the index of the battery assembly after replacement mounted on the vehicle when not being charged or discharged. The processor compares the determination target characteristic acquired by the sensor with the genuine product characteristic stored in the memory, and determines whether the battery assembly mounted on the vehicle is the genuine product from a comparison result.

What is claimed is: 
     
         1 . A determination system for a secondary battery that stores power used for running a vehicle and that is mounted on the vehicle in a replaceable state, the determination system comprising:
 a processor;   a storage device that stores a genuine product characteristic that is a temperature change characteristic of a genuine product, the temperature change characteristic being a characteristic of an index which changes with temperature of the secondary battery and when not being charged or discharged; and   a characteristic acquisition unit that acquires a determination target characteristic that is a temperature change characteristic of the index of the secondary battery after replacement mounted on the vehicle when not being charged or discharged,   wherein the processor
 compares the determination target characteristic acquired by the characteristic acquisition unit with the genuine product characteristic stored in the storage device, and 
 determines whether the secondary battery mounted on the vehicle is the genuine product or not from a comparison result. 
   
     
     
         2 . The determination system according to  claim 1 , wherein the index is open circuit voltage of the secondary battery. 
     
     
         3 . The determination system according to  claim 1 , wherein
 the secondary battery is configured to include a plurality of cells, and   the index is a binding load at which the plurality of cells are bound.   
     
     
         4 . The determination system according to  claim 3 , wherein the binding load is a binding load at a predetermined open circuit voltage. 
     
     
         5 . The determination system according to  claim 1 , wherein
 the secondary battery is configured to include a plurality of cells,   the index is open circuit voltage of the secondary battery and a binding load at which the plurality of cells are bound, and   the processor
 compares the determination target characteristic of the open circuit voltage acquired by the characteristic acquisition unit with the genuine product characteristic to determine whether or not a first difference between the determination target characteristic of the open circuit voltage and the genuine product characteristic is a first threshold or more, 
 when determined that the first difference is the first threshold or more, determines that the secondary battery is not the genuine product, 
 when determined that the first difference is less than the first threshold, compares the determination target characteristic of the binding load acquired by the characteristic acquisition unit with the genuine product characteristic to determine whether or not a second difference between the determination target characteristic of the binding load and the genuine product characteristic is a second threshold or more, 
 when determined that the second difference is the second threshold or more, determines that the secondary battery is not the genuine product, and 
 when determined that the second difference is less than the second threshold, determines that the secondary battery is the genuine product. 
   
     
     
         6 . The determination system according to  claim 1 , wherein
 the secondary battery is configured to include a plurality of cells,   the index is open circuit voltage of the secondary battery and a binding load at which the plurality of cells are bound, and   the processor
 when a representative temperature value at which the determination target characteristic of the open circuit voltage is acquired by the characteristic acquisition unit is within a first temperature range, compares the determination target characteristic of the open circuit voltage acquired by the characteristic acquisition unit with the genuine product characteristic to determine whether or not a first difference is a first threshold or more, 
 when a representative temperature value at which the determination target characteristic of the binding load is acquired by the characteristic acquisition unit is within a second temperature range that is different from the first temperature range, compares the determination target characteristic of the binding load acquired by the characteristic acquisition unit with the genuine product characteristic to determine whether or not a second difference is a second threshold or more, 
 when determined that the first difference is the first threshold or more or that the second difference is the second threshold or more, determines that the secondary battery is not the genuine product, and 
 when determined that the first difference is less than the first threshold or that the second difference is less than the second threshold, determines that the secondary battery is the genuine product. 
   
     
     
         7 . The determination system according to  claim 1 , wherein
 the storage device stores information that can identify a graph indicating a relationship between a value of the index and temperature of the secondary battery as the genuine product characteristic, and   the processor compares a value of the index at each of a plurality of changed temperatures acquired by the characteristic acquisition unit with the graph.   
     
     
         8 . A vehicle on which a determination system for a secondary battery is mounted, wherein
 the secondary battery stores power used for running the vehicle and is mounted in a replaceable state,   the determination system comprises:   a processor;   a storage device that stores a genuine product characteristic that is a temperature change characteristic of a genuine product, the temperature change characteristic being a characteristic of an index which changes with temperature of the secondary battery and when not being charged or discharged; and   a characteristic acquisition unit that acquires a determination target characteristic that is a temperature change characteristic of the index of the secondary battery after replacement mounted on the vehicle when not being charged or discharged, and   the processor
 compares the determination target characteristic acquired by the characteristic acquisition unit with the genuine product characteristic stored in the storage device, and 
 determines whether the secondary battery mounted on the vehicle is the genuine product or not from a comparison result. 
   
     
     
         9 . A determination method using a determination system for a secondary battery that stores power used for running a vehicle and that is mounted on the vehicle in a replaceable state,
 the determination system comprising:   a processor;   a storage device that stores a genuine product characteristic that is a temperature change characteristic of a genuine product, the temperature change characteristic being a characteristic of an index which changes with temperature of the secondary battery and when not being charged or discharged; and   a characteristic acquisition unit that acquires a determination target characteristic that is a temperature change characteristic of the index of the secondary battery after replacement mounted on the vehicle when not being charged or discharged,   the determination method comprising:
 comparing, by the processor, the determination target characteristic acquired by the characteristic acquisition unit with the genuine product characteristic stored in the storage device, and 
 determining, by the processor, whether the secondary battery mounted on the vehicle is the genuine product or not from a comparison result.